Removing Tracks
You can remove any tracks that you have defined in the waveform.
Note: When you remove a track, you are only removing the definition of the track. The audio in the track will still be available in the waveform.
You can remove one or more track in any of these ways:
Select one or more tracks in the Waveform display or Track List, and choose Edit > Delete Tracks.
Select one or more tracks in the Waveform display or Track List, and press the Delete or Backspace key on your keyboard.
Option-click one or more tracks in the Waveform display or Track List, and choose Delete Track(s) from the pop-up menu.
Select one or more tracks in the Waveform display or Track List, and click the Delete Track button.

See Also:

Editing Tracks
Selecting Tracks
Hiding or Showing Tracks for Editing